Improvement in shuttles for sewing-machines



G. A; EDWARDS & G. SUHIEDER.

Shuttles for Sewing-Machines.

Patented Feb. 25,1873.

Fig 1.

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m Pl-loro-umasmmlcmMXMsBoRNEPRacESg) FORGE AFSEL ED /YARDS AND GEORGE SCHIEDER, OF SYRACUSE,

NEW YORK.

PrlPRQVEMENT 5N SHUTTLES FOR SEWiNG-MACl-HNES.

Specification forming part of Letters Patent No. 136,3 HR, dated February 25, 1873.

To all whom it may concern:

Be it known that we, GEORGE ANSEL En- WARDS and GEORGE SoHrEDEu, of Syracuse, New York, have invented certain Improveinentsin Bobbinfor Sewing-Machines, of which the following is a specification:

Our invention relates to shuttles for sewing-machines; and consists in means hereinafter described for governing the tension of the thread carried by it and acting on the bobbin.

Figure 1 represents a shuttle, of similar shape used by all first-class sewing-machines, with improvements claimed inside or in the hollow of the shuttle, and in their proper position for operation, and the whole compact and ready to be placed in the shuttleoarrier of a sewing-machine.

A is the bobbin, filled with thread, and turning upon an adjustable axle, which latter is shown in Fig. 2. B is a burred nut, (also Fig. 5,) which may be turned at option, to the right or left, as different tensions to the thread may require, said burred nut moving by a thread out upon a larger part of the same axle, Fig. 3.

Screwing up the burred nut B, it will be seen that its face operates against the small wire spring 0 coiled around aforesaid axle. (See Fig. 1.) The spring 0, thus effected by thepressure from the nut B, operates in turn against the end of bobbin A, which produces the effect desired.

A small washer of leather or other suitable substance is placed between the coiled spring 0 and the end of bobbin A to render the friction thus obtained as smooth as possible, in order to get a soft tension to the thread.

This pressure above described forces the opposite end of the bobbin A into the countersunk depression in the opposite end of the hollow in the shuttle, (also F, Fig. 6,) which depression is just the size and form (circular) of the end of the bobbin, thereby holding the bobbin A and spindle in their proper positions at this end of the hollow in the shuttle.

It is to be understood thatthe countersunk depression in the hollow at this end of the shuttle should be sufficiently deep to allow the insertion of a piece of leather or other suitable material for this end of the bobbin A to bear against, for the same reason as stated before relative to friction, and thus to obtain a smooth tension for the thread being drawn from the bobbin.

The spindle is held in the shuttle by a small pin passing through the shuttle and through a small hole prepared, and just large enough to receive it, in this end of the spindle, which is flattened where the pin passes through, and which is inserted into a suitable cut in the solid part of the metal to receive it. This end of the spindle is held in the center of the hollow of the shuttle, right and left, but allowing the opposite end to be raised and lowered at will. (See Fig. 6.)

It is to be understood that the center of the round depression in the hollow of the point end of the shuttle should be exactly on a level and center with the pin and perpendicular cut holding the spindle in the opposite end of the hollow of the shuttle, thereby insuring the bobbin to run precisely in the center of the hollow of the shuttle.

To remove the bobbin A for a supply of thread, place the shuttle in the left hand, with the point of the shuttle from the person, with the forefinger of the right hand on the end of the bobbin nearest the person 5 press toward the person and draw upward. This pressure will act upon the coiled spring 0, and will bring the bobbin out of the depression, and the bobbin and axle out of the hollowof the shuttle, so as to allow the bobbin to he slipped off the axle to be refilled.

To return the bobbin, slip the same on the axle, Fig. 6, and allow both to drop down, with the same actionon the bobbin and spring as in removing the same, except that the pressure on the end of the bobbin nearest the person must be toward the person and downward until the bobbin springs into the depres sion made to receive it, when all is secured and ready for use.

Having described our invention, what we claim is- 1. The shuttle provided with the pivoted screw-threaded s1 )indlc,thumb-nut, and spring,

and with the depression F, into which the head of the bobbin may be pressed by the spring and nut, as described.

2. The principle of a bobbin long and hollow to receive an axle. (See Fig. 4.)

p 3. The principle of such a bobbin running on a movable and adjustable axle.

4. The principles for adjusting and confining said axle and bobbin in their proper positions in the shuttle for operation.

5. The principles of the burred nut and Witnesses:

A. T. LEWIS, J. A. H001) 

